Secure, durable, and USPS-compliant vertical mailboxes are essential for multi-dwelling and commercial buildings. The following selections from Salsbury Industries offer USPS access, multiple compartments, and sturdy construction. This guide highlights five top options, with quick specs and practical considerations to help facility managers choose the right system.
| Product | Doors | Mounting | Notes | |
|---|---|---|---|---|
| Salsbury 3504ASU Surface Mounted | 4 | Surface | Yes | Aluminum; scratches resistant; 2 keys per lock |
| Salsbury 3504ARU Recessed Mounted | 4 | Recessed | Yes | Aluminum; 3–7 compartments available |
| Salsbury 3505ARU Recessed Mounted | 5 | Recessed | Yes | Includes country of manufacture note |
| Salsbury 3503ASU Surface Mounted | 3 | Surface | Yes | Aluminum; striated trim; 2 keys per lock |
| Salsbury 3506ZSU Surface Mounted Bronze | 6 | Surface | Yes | USPS-STD-4B+; bronze finish; 5-1/2″ W x 16-1/4″ H compartments |
Salsbury 3504ASU Surface Mounted Vertical Mailbox
The Salsbury 3504ASU is a surface-mounted vertical mailbox with four doors. It features striated doors and trim to resist scratching, and each door is secured with a 5-pin cylinder cam lock, supplied with two keys. This aluminum unit provides USPS access and is suitable for building mailrooms requiring straightforward, durable installation. The four-compartment configuration supports moderate mail volume and efficient sorting for residents.
Salsbury 3504ARU Recessed Mounted Vertical Mailbox
The 3504ARU is a recessed vertical mailbox featuring four doors and USPS access. The rugged aluminum construction pairs with a scratch-resistant finish, and the unit is available in configurations with 3 to 7 compartments to fit different building sizes. It includes a 5-pin cylinder cam lock and two keys, making maintenance straightforward for property managers.
Salsbury 3505ARU Recessed Mounted Vertical Mailbox
The 3505ARU offers five doors in a recessed configuration and USPS access. This model emphasizes country of manufacture and manufacturer branding, signaling a solid, domestically supported product. With five compartments, it suits mid-sized communities or small office buildings seeking a compact, secure mail solution. The doors use a 5-pin cam lock (with two keys) to keep mail secure.
Salsbury 3503ASU Surface Mounted Vertical Mailbox
The 3503ASU is a compact, surface-mounted option with three doors. It maintains the same scratch-resistant construction and 5-pin cam lock system with two keys. This unit is appropriate for smaller entryways or buildings with limited mailbox space, delivering USPS access without occupying substantial wall area. It supports efficient mail distribution while maintaining durability.
Salsbury 3506ZSU Surface Mounted Bronze
The 3506ZSU is a six-door, bronze-finished vertical mailbox with USPS access. It adheres to USPS-STD-4B+ specifications and offers large compartment dimensions of 5-1/2″ W x 16-1/4″ H x 6-3/4″ D. Each door includes a 5-pin cam lock and two keys. This model is well-suited for exterior entries or hallways where a decorative bronze finish is preferred alongside robust security and compliance.
Salsbury 3506SSU Surface Mounted Vertical Mailbox Sandstone
The 3506SSU mirrors the 3506ZSU in function while offering a sandstone finish for a more neutral, durable look. It meets USPS-STD-4B+ specs, with six doors and individual compartments sized at 5-1/2″ W x 16-1/4″ H x 6-3/4″ D. The 5-pin cylinder cam locks provide two keys per compartment, supporting secure mail handling for mid-to-large building populations.
Buying Guide
- Door count and compartment size: Choose between 3–7 compartments depending on resident count and mail volume. Larger buildings benefit from 5–6 doors with ample interior space.
- Mounting design: Surface-mounted units are easier to install in retrofit projects, while recessed models save wall space and offer a cleaner look.
- USPS compliance: Ensure the unit is USPS-STD-4B+ compatible and includes proper security features, such as 5-pin cam locks and two keys per door.
- Material and finish: Aluminum is lightweight and corrosion resistant; bronze or sandstone finishes can enhance exterior aesthetics while staying durable.
- Locking hardware: Confirm keys per door and availability of replacement locks. Some models emphasize manufacturer branding or country-of-manufacture disclosures.
- Maintenance considerations: Scratched-resistant finishes minimize wear in high-traffic areas. Consider lock maintenance and weather exposure for exterior installations.
- Security features: Look for robust construction, tamper resistance, and compatibility with local codes. Plan for secure mounting to deter vandalism and mail theft.
- Installation environment: Indicate indoor lobby, entry vestibule, or exterior wall mounting when selecting configuration and finish to match climate and vandal-resistance needs.
- Future scalability: If you anticipate increased mail volume, choose a modular option with potential for additional compartments or a larger configuration later.
Note: Specifications reflect common configurations and typical features listed by manufacturers. Always verify current USPS compliance and availability with the supplier before finalizing purchases.